<template>
  <div class="home_div">
    <el-container class="home_container">
<!--      头部区-->
      <el-header>
        <div>
<!--          <img src="../assets/logo1.jpg">-->
          <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button></el-header>
<!--      页面的主体区域-->
      <el-container>
<!--       侧边栏 -->
        <el-aside :width="isCollapse? '64px' : '200px'">
          <div class="toggle-button" @click="toggleCollpase">|||</div>
<!--          侧边栏菜单区-->
          <el-menu
                  background-color="#333744"
                  text-color="#fff"
                  active-text-color="#409eff"
                  :unique-opened="true"
                  :collapse="isCollapse"
                  :collapse-transition="false"
                  :router="true"
                  :default-active="activePath"
          >
<!--            想要是变量值就需要加冒号-->
<!--            这里是一级菜单-->
            <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
<!--              一级菜单的模板区-->
              <template slot="title">
<!--                图标-->
                <i :class="iconsObj[item.id]"></i>
<!--                文本-->
                <span>{{item.authName}}</span>
              </template>
              <!--这里需要加上空字符，应该 它只识别字符串类型-->
<!--              二级菜单-->
              <el-menu-item
                      :index="'/' + subItem.path"
                      v-for="subItem in item.children"
                      :key="subItem.id"
                      @click="saveNavState('/' + subItem.path)"
              >
                <template slot="title">
                  <!--                图标-->
                  <i class="el-icon-menu"></i>
                  <!--                文本-->
                  <span>{{subItem.authName}}</span>
                </template>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
<!--        右边的主体区域-->
        <el-main>
<!--          路由的占位符-->
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
  </div>
</template>

<script>
  export default {
    name: "Home",
    data(){
      return{
        menuList:[],
        iconsObj:{
          125:'iconfont icon-users',
          103:'iconfont icon-tijikongjian',
          101:'iconfont icon-shangpin',
          102:'iconfont icon-danju',
          145:'iconfont icon-baobiao'
        },
        isCollapse:false,
        activePath:''
      }
    },
    created() {
      this.getMenuList()
      this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods:{
      logout(){
        window.sessionStorage.clear();
        this.$router.push('/login')
      },
      //获取所有的菜单
      async getMenuList(){
        const{data:res} = await this.$http.get('menus')
        if(res.meta.status !==200 ) return this.$message.error(res.meta.msg)
        this.menuList = res.data
      },
      //点击按钮，切换菜单的折叠与展开
      toggleCollpase(){
        this.isCollapse = !this.isCollapse;
      },
      saveNavState(activePath){
        window.sessionStorage.setItem('activePath',activePath);
        this.activePath = activePath
      }
    }
  }
</script>

<style lang="less" scoped>
  .home_div{
    height: 100%;
  }
  .home_container{
    height: 100%;
  }

  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    /*item与centext的区别*/
    align-items: center;
    color: #ffffff;
    font-size: 20px;
    > div{
      display: flex;
      align-items: center;
      span{
        padding-left: 15px;
      }
    }
  }

  .el-aside{
    background-color: #333744;
    .el-menu{
      border-right:0;
    }
  }
  .el-main{
    background-color: #eaedf1;
  }

  .iconfont{
    margin-right: 10px;

  }
  .toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color:#ffffff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }

</style>